リン酸水素カルシウム二水和物と水酸化カルシウムを出発原料とした水熱法によるハイドロキシアパタイトコーティング

概要

論文の詳細を見る
Solidification of hydroxyapatite (HA) and its coating on titanium (Ti) rod was achieved simultaneously by utilizing a hydrothermal hot-pressing (HHP) method at a low temperature of 135°C. A mixture of calcium hydrogen phosphate dehydrate (DCPD) and calcium hydroxide was used as a starting powder material for HA coating. Ti rod was treated with the alkali solution before HHP treatment. The powder mixture and the Ti rod were placed into a double layered capsule. The capsule was put into a batch type autoclave for hydrothermal treatment.Pull-out tests were conducted to obtain an estimate of the interfacial property or the HA/Ti interface. The shear fracture strength obtained from the pull-out tests was approximately 4.0-5.5 MPa. In post-test observations after fracture tests, HA ceramics remained on Ti rod. It could be demonstrated that the fracture occurred into the HA ceramics, not into the HA/Ti interface. This observation suggests that the fracture property of the HA/Ti interface was close to or higher than that of the HA ceramics only.
社団法人粉体粉末冶金協会の論文
2005-11-15